:root {
  --navy: #315b78;
  --navy-dark: #24465f;
  --teal: #2498b5;
  --ink: #263b4a;
  --muted: #617483;
  --line: #dbe5eb;
  --page: #edf4f7;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0) 38rem),
    linear-gradient(180deg, #f7fafc 0%, var(--page) 100%);
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
}

.site-header {
  height: 56px;
  display: flex;
  align-items: center;
  color: var(--white);
  background: linear-gradient(90deg, var(--navy-dark), var(--navy));
  box-shadow: 0 2px 12px rgba(27, 56, 75, 0.2);
}

.header-inner {
  width: 100%;
  height: 100%;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  width: 162px;
  height: 37px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.entry-link {
  padding: 8px 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 300;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: opacity 160ms ease;
}

.entry-link:hover,
.entry-link:focus-visible {
  opacity: 0.72;
}

.entry-link:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.55);
  outline-offset: 2px;
}

main {
  width: 100%;
  flex: 1;
  display: grid;
  place-items: center;
  padding: 48px 22px;
}

.maintenance-card {
  width: min(940px, 100%);
  padding: clamp(28px, 5vw, 54px);
  text-align: center;
  border: 1px solid rgba(202, 218, 227, 0.9);
  border-top: 5px solid var(--teal);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 22px 55px rgba(35, 69, 91, 0.13);
}

.message {
  max-width: 720px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: var(--navy-dark);
  font-size: clamp(2rem, 5vw, 3.45rem);
  line-height: 1.08;
}

.description {
  margin: 20px auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.13rem);
  line-height: 1.65;
}

.maintenance-image {
  width: min(700px, 100%);
  max-height: 390px;
  margin: 30px auto 0;
  display: block;
  object-fit: contain;
  border-radius: 6px;
}

.site-footer {
  height: 56px;
  min-height: 56px;
  padding: 12px 22px;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.94);
  background: var(--navy);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .site-header {
    height: 52px;
  }

  .header-inner {
    padding: 0 10px;
  }

  .brand {
    width: 141px;
    height: 32px;
  }

  .entry-link {
    font-size: 0.74rem;
  }

  main {
    padding: 26px 14px;
  }

  .maintenance-card {
    padding: 30px 18px 24px;
  }

  .maintenance-image {
    margin-top: 24px;
  }

  .site-footer {
    height: 52px;
    min-height: 52px;
  }
}